Analisi del rischio d’amianto nei progetti edilizi attraverso le analisi FTA e FMEA

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supervision during main working phases.

Asbestos Hazards Analysis in

Construction Projects With the Fault

Tree Analysis and the Failure Mode and

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respiratory tract and protective clothing.

intend to proceed with a probabilistic FTA - Fault Tree Analysis, based on a backward approach, and the FMEA

automobile industries. The analysis is carried out on the three techniques

the materials and the products to be used, the individual protection devices to be done to operate in complete

T

are witnessing a worrying increase in

The occupational diseases caused

data related to Mesothelioma cases

cases. About occupational cancers, construction workers are the most

cancer than all other workers.

construction industry determines a

is normally carried out by specialists with dedicated training. The

building intervention where laborers

or without breaking the slabs, and reasons suitable temporary works must

during the remediation interventions,

remediation and describes the technical

materials containing asbestos, the or mobile construction sites provided

Remediation can be achieved by three

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plates with products that cover the

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the appropriate protection devices, workers.

concerning materials containing

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Asbestos is a natural mineral with a

gives the asbestos a remarkable mechanical resistance and a high

biological agents, abrasion and thermal and mechanical wear, it also has sound-absorbing and heat-insulating properties and easily binds with building

characteristic to divide longitudinally, whereby the material maintains the

inhaled, it can penetrate deep into the pulmonary alveoli and be carcinogenic.

remediation work. The importance

considered the Framework Law on asbestos as it was intended to regulate

nature through which the intervention criteria have been established, the operating procedures to be adopted

taken in materials removal work.

These mandatory communications are preventive, ie they concern activities that have not yet been carried out. To arrive at an assessment on the

developed over time to obtain objective

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Regions.

dimensional model that has the purpose indications on the actions that must be taken towards cement materials

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inserted

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material

The calculation is made by adding the scores assigned to the parameters

graph, and the scores attributed to the

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analysis, assessment and subsequent to have methodologies and support tools that, through the acquisition

evaluate and manage in scenarios

the risk assessment process, to provide risk analysis and management and small business types where the risk underestimation could be greater,

FMEA and FTA, already used in reality by greater risks. The research activity

With this study we intend to proceed with a probabilistic risk assessment, using the Risk Analysis tools.

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a preventive study aimed at eliminating critical system issues

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Analysis system are the correct initial

microactivity in which the error resides.

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dei guasti

undesired event to determine (or rather causes in a systematic way, through steps.

The Fault Tree Analysis was developed

to the universal system, not just to the within the same company noted the results that this program was able to provide and began to use the FTA

Failure tree analysis was, in the

mid-it was used to evaluate the probabilmid-ity Moon and their return to Earth in good condition. The result was a probability unacceptably low, against the decidedly

system.

over time shows that the interest in the FTA is not declined, but currently remains constant over time. As with any new discovery, there have been criticisms over the years, but the the FTA have discredited the arguments against it. Thus the FTA has become used internationally.

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The basic concept that drives the

preceding. That is, you should not jump directly to the root causes, but you steps through the causes immediately

steps, will end with the basic causes analysis.

The FT is presented as a graphical

these diagrams can be grouped into 5 event, top event, undeveloped event and conditioning event. The events are located in the tree with a precise

symbology, as are the logical gates that connect events to one another. There

its characteristics can be evaluated using the Boolean equations. The events correspond to the variables

between the events, corresponds to the the intersection between the events, corresponds to the product.

When the Top Event equation is

assembly, installation and control phases.

The FMEA originated in the United

space missions.

the automaker Ford to reduce the risks

FMEA.

by various quality management hours worked. The relevant time interval considered corresponds to the duration

The developed approach involves a probabilistic risk assessment, using the

Analysis. The analysis is carried out on the three remediation techniques, carried out, the products to be used, the individual protection devices to wear

To carry out the analysis, a work carried

building located in Minerbio, in the

rate and relevant time interval. The

each other, whose study represents

strategies. Knowing how accidents prevention and protection action, but

to accidents in order to make them

reported in the individual complaints are traced to codes and constitute an analysis. Within its database, which can methodology, a quality management

average square deviation (indicated

or service to a certain level, particularly

are determined.

occurring the cause.

through the controls normally used in the process.

These indices are evaluated with a

corrective actions must be decided

prevention, through adequate training

Detectability.

and to highlight the items on which to intervene subsequently.

with the encapsulation technique

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Fault Tree Analysis to remediation by encapsulation.

prepared containing all the possible events that cause the injury and the material agents involved in such events.

and the material agent involved in the

calculations is obtained.

in the construction report based on

The Top Event is represented by the

operating phases during which the Top

we want to impose that the TE occurs

could be avoided through preventive

there is no control during the work, otherwise the error could be noticed. This proceeds with the construction represented by basic events that can

the Top Event, the event descriptions are replaced with the corresponding codes. events were indicated with the letter E,

million.

construction site.

waste.

could be avoided through preventive maintenance or control.

with the B the basic events and with the Then it proceeds with the qualitative evaluation using the Boolean equations,

event becomes a condition to be

control during the work, otherwise the error could be noticed. This proceeds until the causes are all represented by developed.

the Top Event, the event descriptions are replaced with the corresponding codes. events were indicated with the letter E, with the B the basic events and with the

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The same analysis procedure was

the coverage, which represents about

using the removal technique involves

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During the remediation through Removal the most risky phase is the

Analysis techniques is a valid choice to make critical and reasoned choices in

-thus allowing a meticulous evaluation -vene on individual events by making preventive changes.

-ads to an accurate analysis because the FTA method, which represents the most

the risk and its causes, while the FMEA -its consequences.

into consideration when doing an analy

-makes the analysis chooses to take into consideration. Another consideration to make is that the preponderant com-ponent is the worker and is associated

-product between probabilities related to

-numerous uncertainties.

FMEA analysis techniques, a more de -ensuring the most precise and objective the remediation through Removal

however be considered that the Encapsulation phase is present in all carrying out the work, so it was obvious

statistical data and the data collected by removal turns out to be the riskiest manipulate the asbestos-cement slabs.

companies carrying out remediation work on materials containing asbestos would lead to even more detailed and precise results.

Finally, it is important to underline that, however precise a risk analysis may almost impossible to obtain because it -keep under control.

data and the data collected in the

litera-asbestos-cement slabs.

, , Scuola Edile della provincia di Modena.

, , January 1976. , , Dario , , , 9 , . , , , , dispense , , , , , 9 novembre , , , , Maggioli Editore. , , Roma , , Eidgenössische technische , ,

, master degree thesis in Architecture and Building Engineering (M. Bologna.

,

, ,

,

, master degree thesis in Architecture and Building Engineering (M. Bologna.